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The proton number of barium (Ba) is 56. It is in Group II of the periidic table how many electrons would you expect a barium atom to contain in its outer energy level?
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Type the correct answer in each box.balance the chemical equation.__ n203 β‘οΈ __ n2 +__ o2
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The proton number of barium (Ba) is 56. It is in Group II of the periidic table how many electrons w...
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